桥梁钢Q345q在3种模拟大气环境中的腐蚀行为研究

郭铁明,张延文,秦俊山,宋志涛,董建军,杨新龙,南雪丽

Corrosion Behavior of Q345q Bridge Steel in Three Simulated Atmospheres

Tieming GUO,Yanwen ZHANG,Junshan QIN,Zhitao SONG,Jianjun DONG

表1 3种模拟大气环境的腐蚀介质成分

Table 1 Constituents of three corrosive solutions simulating atmospheric environments

Corrosive medium	Composition	pH	Standard
Deicing salt	Na₂SO₄ (0.500±0.002) g	9.3±0.5	GB/T 19746-2005
	Na₂SO₃ (0.250±0.002) g
	Na₂S₂O₃ (0.100±0.002) g
	NaCl (52.5±1) g
	CaCl₂·2H₂O (52.5±1) g
NaHSO₃	0.01 mol/L NaHSO₃	4.4	TB/T2375-1993
Mixed solution	Deicing salt+0.01 mol/L NaHSO₃	4.8